CN107335807A - One kind is metal powder injection molded to use binding agent - Google Patents
One kind is metal powder injection molded to use binding agent Download PDFInfo
- Publication number
- CN107335807A CN107335807A CN201611146007.XA CN201611146007A CN107335807A CN 107335807 A CN107335807 A CN 107335807A CN 201611146007 A CN201611146007 A CN 201611146007A CN 107335807 A CN107335807 A CN 107335807A
- Authority
- CN
- China
- Prior art keywords
- parts
- binding agent
- metal powder
- injection molded
- powder injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Metal powder injection molded binding agent is used the present invention relates to a kind of.It is provided by the invention metal powder injection molded to include following parts by weight with binding agent：1 10 parts of 50 95 parts of paraffin, 1 15 parts of high density polyethylene (HDPE), stearic acid or stearic acic derivative, 1 10 parts of polyalcohol.The binding agent feeding prepared using inventive formulation, solid powder volume loadings are up to 50 70%, the sintering shrinkage of material can effectively be controlled, 0.2 1% can be reached to the dimension control scope of material, reuse number to reach more than 10 times, reduce product percent defective, it is extremely useful for cold runner injection forming technology, the subsequent treatment of raw material can be effectively reduced, reduces production process cost.
Description
Technical field
The invention belongs to metal forming additive agent field, and in particular to one kind is metal powder injection molded to use binding agent.
Background technology
Metal Injection Molding (MIM) is to shape the small miniature and special near-net-shape skill of abnormal complex parts
Art.The raw material that Powder Injection Molding Technology uses i.e. feeding be by metal or ceramic powders and binder making form one
Determine the mixture at temperature with certain fluidity and forming.In powder injection-molded feeding composition, the kind of binding agent
Class and composition directly influence the techniques such as banburying, shaping, degreasing, so as to have influence on the consistency of sintered article, microstructure, chi
Very little precision, mechanical property etc..Therefore, binding agent configuration and addition be Feedstock of Powder Injection Molding prepare key core skill
Art.
During powder injection-molded, because injecting systems and glue-feeding system can retain substantial amounts of feeding so that feeding will
It is reused.And binding agent in process of injection molding because high temperature and injection pressure act on, it will degraded and heat fatigue, drop
The mobility and mouldability of low feeding, injection-molded product is set to produce flow liner, corner lacks material, Density Distribution is uneven, deformation is tight
The defects of weight, and the reuse number of feeding is reduced, increase production cost, and the reuse number of feeding is reduced, increase
Production cost.
The content of the invention
The invention aims to provide a kind of degraded and heat fatigue for reducing binding agent in process of injection molding, carry
High yield quality, the reuse number for increasing feeding, reduction the metal powder injection molded of production cost use binding agent.
To achieve the above object, the technical solution adopted by the present invention is：A kind of metal powder injection molded binding agent bag
Include following parts by weight：Paraffin 50-95 parts, high density polyethylene (HDPE) 1-15 parts, stearic acid or stearic acic derivative 1-10 parts, polyalcohol
1-10 parts.
The binding agent of the present invention does not contain metallic element, can be completely out after degreasing process, does not change sintered article
Composition constituent element and performance.Metal, ceramics, metal and Ceramic Composite equal sphere or irregular shape solid powder can be used for
Feeding prepare.Stearic acid and its derivative effect are lubrications in formula, reduce the friction of feeding and mould inner surface, just
In shaping and demoulding；Paraffin is feeding filler, improves mobility of the feeding in shaping；High density polyethylene (HDPE) is the bone of feeding
Frame constituent element, improve the intensity of injection moulding green compact.The binding agent of the present invention does not contain metallic element, can quilt after degreasing process
It is completely out, do not change the composition constituent element and performance of sintered article.Metal, ceramics, metal and Ceramic Composite etc. can be used for
It is prepared by spherical or irregular shape solid powder feeding.The binding agent prepared by inventive formulation can improve solid powder
Useful load, and less residue, product can be reused more than 10 times, the percent defective of the shaped article of preparation drops significantly
It is low.
The solid powdery of each component can be directly uniformly mixed at room temperature in formula, and each constituent element can also exist
It is uniformly mixed under molten condition by banbury, then prepares the particle of corresponding granule size as needed；Can be with
Each constituent element is directly uniformly mixed with metal dust by banbury in the molten state, then prepares phase as needed
Answer the particle of granule size.
Metal powder injection molded include following parts by weight with binding agent it is further preferred that above-mentioned：Paraffin 60-80 parts,
High density polyethylene (HDPE) 5-10 parts, stearic acid or stearic acic derivative 2-8 parts, polyalcohol 2-8 parts.
Metal powder injection molded include following parts by weight with binding agent it is further preferred that above-mentioned：It is 70 parts of paraffin, highly dense
Spend 8 parts of polyethylene, stearic acid or 6 parts of stearic acic derivative, 6 parts of polyalcohol.
Further, the above-mentioned metal powder injection molded polyalcohol described in binding agent is pentaerythrite, glycerine, three hydroxyls
One or more of mixing in methyl ethane, xylitol, sorbierite.
It is more in the prior art that binder additives are used as using benzoic ether or O-phthalic vinegar dibutyl ester etc., because it can change
The com-patibilising effect of kind binding agent and metal dust, improves feeding internal mixing pass and mixes and green compact quality stability.And these are added
Agent is non-water soluble substance, and in process of production and post processing disposal costs height, environment friendly are poor, and prepare and locate
Equipment is managed for the more difficult combination of the aqueous process such as water atomization metal dust.The polyalcohol that the present invention is added belongs to water
Soluble substance, and with causing system mobile performance during other component compatibilities more preferably, unsticking step is easier, so that production
The percent defective of product substantially reduces, product recycling number increase.Still more preferably, the polyalcohol is trihydroxy methyl second
One or more of mixing in alkane, xylitol, sorbierite.Using this optimization formula and proportioning obtained binding agent can be caused to exist
The reuse number of feeding improves during use, product percent defective further reduces.
Further, the above-mentioned metal powder injection molded stearic acic derivative described in binding agent is metallic stearic
One or more of mixing in salt, rare-earth stearate salt, stearic acid benzoyl methane, stearic acid season four amylalcohol ester.
The binding agent feeding prepared using inventive formulation, solid powder volume loadings can be controlled effectively up to 50-70%
The sintering shrinkage of prepared material, 0.2-1% can be reached to the dimension control scope of material, number is reused and reach 10
More than secondary, product percent defective is reduced, extremely useful for cold runner injection forming technology, cold runner injection moulding process is MIM
One kind, the temperature of runner of the feeding between injection port to mold cavity is less than feeding fusing point when pointed injection is molded, but one
As be higher than room temperature.The present invention can effectively reduce the subsequent treatment of raw material, reduce production process cost.
Embodiment
With reference to specific embodiment, the present invention will be further described.The embodiment is only being preferable to carry out for the present invention
Example, is not intended to limit the invention, for those skilled in the art, the present invention can have various changes and change
Change.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention
Protection domain within.
Embodiment one
At room temperature, paraffin 50kg, high density polyethylene (HDPE) 8kg, stearic acid 6kg, sorbierite 6kg are uniformly mixed and produced
Product.
Embodiment two
At room temperature, paraffin 92kg, high density polyethylene (HDPE) 15kg, aluminum stearate 1kg, xylitol 10kg are uniformly mixed
Produce product.
Embodiment three
At room temperature, paraffin 60kg, high density polyethylene (HDPE) 10kg, Lanthanum Stearate 8kg, trimethylolethane 2kg are stirred mixed
Conjunction uniformly produces product.
Example IV
At room temperature, paraffin 80kg, high density polyethylene (HDPE) 5kg, the amylalcohol ester 5kg of stearic acid season four, sorbierite 8kg are stirred mixed
Conjunction uniformly produces product.
The binding agent that embodiment one to example IV is prepared is mixed with solid metal powder and is injection moulded, solid
The volume loadings of metal dust are 62-68%, and the mixing time of shaping is 20-60 minutes, and mixing temperature and injection temperature are
70-150 DEG C, debonding proces use the technique of alkane solvent degreasing and thermal debinding combination, can effectively control the sintering shrinkage of material
Rate, the dimension control scope to material are 0.2-1%, and the reuse number of solid metal powder is 11-14 times, and general
Logical binder phase is than reducing product percent defective 12-19%.
Claims (5)
1. one kind is metal powder injection molded to use binding agent, it is characterised in that：Including following parts by weight component：Paraffin 50-95 parts,
High density polyethylene (HDPE) 1-15 parts, stearic acid or stearic acic derivative 1-10 parts, polyalcohol 1-10 parts.
2. metal powder injection molded binding agent is used according to claim 1, it is characterised in that：Including following parts by weight group
Part：Paraffin 60-80 parts, high density polyethylene (HDPE) 5-10 parts, stearic acid or stearic acic derivative 2-8 parts, polyalcohol 2-8 parts.
3. metal powder injection molded binding agent is used according to claim 1, it is characterised in that：Including following parts by weight group
Part：6 parts of 70 parts of paraffin, 8 parts of high density polyethylene (HDPE), stearic acid or stearic acic derivative, 6 parts of polyalcohol.
4. metal powder injection molded binding agent is used as claimed in any of claims 1 to 3, it is characterised in that：Institute
Polyalcohol is stated as one or more of mixing in pentaerythrite, glycerine, trimethylolethane, xylitol, sorbierite.
5. metal powder injection molded binding agent is used as claimed in any of claims 1 to 3, it is characterised in that：Institute
Stearic acic derivative is stated as in Metallic stearates, rare-earth stearate salt, stearic acid benzoyl methane, stearic acid season four amylalcohol ester
One or more of mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146007.XA CN107335807A (en) | 2016-12-13 | 2016-12-13 | One kind is metal powder injection molded to use binding agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146007.XA CN107335807A (en) | 2016-12-13 | 2016-12-13 | One kind is metal powder injection molded to use binding agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107335807A true CN107335807A (en) | 2017-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611146007.XA Pending CN107335807A (en) | 2016-12-13 | 2016-12-13 | One kind is metal powder injection molded to use binding agent |
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| CN (1) | CN107335807A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114192772A (en) * | 2021-11-12 | 2022-03-18 | 深圳市泛海统联智能制造有限公司 | Non-magnetic high-nitrogen manganese stainless steel feed and preparation method thereof |
| CN114472880A (en) * | 2021-12-28 | 2022-05-13 | 苏州炻展新材料科技有限公司 | Binder for metal powder and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1644278A (en) * | 2005-01-12 | 2005-07-27 | 北京科技大学 | Ti6Al4V alloy injection forming method |
| CN1686642A (en) * | 2005-05-08 | 2005-10-26 | 北京科技大学 | Method of preparing high size precision profiled molybdenum parts |
| JP2010095789A (en) * | 2007-12-26 | 2010-04-30 | Dowa Electronics Materials Co Ltd | Metal particle dispersion liquid, coating film, metal film, conductive paste, and method for producing metal film |
| CN102218720A (en) * | 2011-05-11 | 2011-10-19 | 王峰 | Connector for joint double offset ring ratchet spanner and manufacturing method thereof |
| CN104801706A (en) * | 2015-04-23 | 2015-07-29 | 山东金珠材料科技有限公司 | Wax-based binder for metal powder injection molding |
-
2016
- 2016-12-13 CN CN201611146007.XA patent/CN107335807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1644278A (en) * | 2005-01-12 | 2005-07-27 | 北京科技大学 | Ti6Al4V alloy injection forming method |
| CN1686642A (en) * | 2005-05-08 | 2005-10-26 | 北京科技大学 | Method of preparing high size precision profiled molybdenum parts |
| JP2010095789A (en) * | 2007-12-26 | 2010-04-30 | Dowa Electronics Materials Co Ltd | Metal particle dispersion liquid, coating film, metal film, conductive paste, and method for producing metal film |
| CN102218720A (en) * | 2011-05-11 | 2011-10-19 | 王峰 | Connector for joint double offset ring ratchet spanner and manufacturing method thereof |
| CN104801706A (en) * | 2015-04-23 | 2015-07-29 | 山东金珠材料科技有限公司 | Wax-based binder for metal powder injection molding |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114192772A (en) * | 2021-11-12 | 2022-03-18 | 深圳市泛海统联智能制造有限公司 | Non-magnetic high-nitrogen manganese stainless steel feed and preparation method thereof |
| CN114192772B (en) * | 2021-11-12 | 2024-05-03 | 深圳市泛海统联智能制造有限公司 | Non-magnetic high-nitrogen manganese stainless steel feed and preparation method thereof |
| CN114472880A (en) * | 2021-12-28 | 2022-05-13 | 苏州炻展新材料科技有限公司 | Binder for metal powder and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171110 |
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| RJ01 | Rejection of invention patent application after publication |